New Keyboard Boot Problems

I recently bought a dynex keyboard (nothing fancy, just needed a keyboard) and
my computer now will not boot past the COMPAQ logo at the beginning. If i unplug the keyboard and reboot, it boots properly, and i can then plug my keyboard in and it works fine. It is connected to a usb port, and i cannot use an adapter because the normal keyboard port is broken (which is why i bought a new keyboard) any ideas anyone? i am running Windows XP home edition